Thanks for your reply guys !

I sent the motor to Hacker in Germany for investment, and they disassembled the motor for complete inspection. They changed both motor- and gearbox-bearings + the coling fan. The planetary-gear-bearings (3ea) was not changed, i guess my mobil 28-grease have done the job quite good. In fact, they still look like new :-).

Hacker/germany has excellent service, and i must say i am suprised of the low pricing for the complete work.

Thanks,
Kjell Olav